The sign X stands for an unkonwn number.这句话的意思是什么?

The sign X stands for an unkonwn number.这句话的意思是什么? what does the sign the sign means: the sign says 改错 the sign industry是什么意思 The Color Best Stands for the Olympics “The sky Stands high in the The house stands at the foot_____a hill the heaven stands by the good girl What letter stands for the ocean? what letter stands for the ocean? what does the sign mean. sign at the first desk The sign says:No_____(smoke)! the sign reads...=the sign said..还是the sign says.. the sign reads...=the sign said还是the sign saysthanks ( ) 1.There is _____ “u” in _____ word “uniform.”.A) an,a B) an,the C) a,a D) a,the( ) 2._____ sign here stands for _____ mistake.A) A,a B) A,the C) The,a D) The,the( ) 3.We made Joyce _____ monitor ____ her experience.A) a,because B) the,bec sign